Touch.pageX
read-only property returns the X coordinate of the touch point relative to the viewport, including any scroll offset.
touchItem.pageX;
A
long
representing the X coordinate of the touch point relative to the viewport, including any scroll offset.
This example illustrates how to access the
触摸
对象的
Touch.pageX
and
Touch.pageY
特性。
Touch.pageX
property is the horizontal coordinate of a touch point relative to the viewport (in CSS pixels), including any scroll offset. The
Touch.pageY
property is the vertical coordinate of a touch point relative to the viewport (in CSS pixels), including any scroll offset.
In following simple code snippet, we assume the user initiates one or more touch contacts on the
source
element, moves the touch points and then releases all contacts with the surface. When the
touchmove
event handler is invoked, each touch point's
Touch.pageX
and
Touch.pageY
coordinates are accessed via the event's
TouchEvent.changedTouches
列表。
// Register a touchmove listeners for the 'source' element
var src = document.getElementById("source");
src.addEventListener('touchmove', function(e) {
// Iterate through the touch points that have moved and log each
// of the pageX/Y coordinates. The unit of each coordinate is CSS pixels.
var i;
for (i=0; i < e.changedTouches.length; i++) {
console.log("touchpoint[" + i + "].pageX = " + e.changedTouches[i].pageX);
console.log("touchpoint[" + i + "].pageY = " + e.changedTouches[i].pageY);
}
}, false);
| 规范 | 状态 | 注释 |
|---|---|---|
| Touch Events – Level 2 | 草案 | No change from the previous version. |
| 触摸事件 | 推荐 | 初始定义。 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
pageX
|
Chrome 22 | Edge ≤18 |
Firefox
52
|
IE No | Opera Yes | Safari No | WebView Android Yes | Chrome Android Yes | Firefox Android 6 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes |
完整支持
不支持
见实现注意事项。